Nut and bolt locking device



March l0,` 1925. 1,528,777

H. E. MARTING NUT AND BOLT LOCKING DEVICE Filed Dec'. 6. 19225 Ilm K EIWI u /7 e/ Mar/ing Patented Mar. 10, 1925.

UNITED fs rares PATENT zoryrlce.

HEBER-E. MARTING, or nu'mnnnrcnn, Naw JERSEY, essIGNo'n. To WESTERN VTRIO COMPANY, iNOORPORATD, or NEW YORK, N. Y., .A CORPORATION or New YORK.

NUT AND -BOLT vLOCKING nnvrcr.,

Application ledvDecember 6,1923. Serial NofSjQSl.

To all whom t may concern:

Beitfknown that ,L-Hnnnn 1E; MARTTNG, a citizen ofthe United States ot America, residing at Rutherford, in the countyot Bergen, State ot New Jersey, :have invented certain new and useful Imp-roif'ements in Nut and Bolt Locking Devices, of which the following is i a full, clear,l concise,A and exact description.

This invention relates to nut and bolt holding `devices and. Imore particularly to locking devices which :are designed to fasten bolts securely `in place Zwhen used in connection-with concrete inserts and the like.

lt is 4the Object of this invention V.to .provide an vanchoring ldevice for atbo'lt or nut whereby shaft hangers, brackets, 4pedesta-ls or other devicesmay bereadily and'securely attached to theirsupports. vThesesupports1 so called concrete inserts, consist of a socket member having an opening or groove in Lits under-side 'to receive i the bolt head. When the insert is embedded in the concrete its underside is flush with the concrete surface.

The bolt may then be positioned at any point` along the groove.

A common method of supporting structuresr is by the use of square head bolts which are introduced in the concrete insert at specially enlarged openings placed at convenient intervals along the groove.

A disadvantage of ythis method is apparent when it is realized that it is some times necessary to insert one structure alongside another particular structure. It there is no enlarged opening near the desired position all existing structures between the nearest opening and the desired position must be removed7 the structure inserted and the existing structures replaced. The involves a great loss of time and labor. By eliminating the enlarged openings and providing a T head bolt which may be inserted at any point along the slot, this ditliculty is obviated.

It is a feature of this invention to provide flexible means for anchoring bolts in concrete ceilings, walls and floors. j

Another .feature of' this invention is thel provision of a specially constructed locking device for guarding against undesired turning of a bolt in the slot of its associated sup-- port,

Referring Anow specifically tothe drawings:

Fig. 1 is asection through a conc-rete insert showing a boltto which isattached a structure to be supported. The head-ot the bolt has been inserted in the groove or slot and the lockingdevice securely fastened in position for preventing the bolt from turning.

Fig. Q isanother view of the concrete insert `taken `at right angles to that shown in Fig'. 1 and illustrates the way in which the lockingdevice grips the bolt head.

Fig. 3 is a perspective elevation ot the locking device, and

Fig. .t shows the relation of the bolt and the locking device before being introduced into the groove.

Referring specifically to Figs. 3 and 4, it will beseen thatthe locking device consists ot' ya-,rigid member having a base l in which is an aperture 2 .through which shank 3 of the bolt may be passed. Integral with the base 1 and symmetrically positioned with respect to the aperture 2, are two upwardly projecting rigid members 4: and 5. The length-wise dimensions of these members isslightly less than the width of the aperture or slot of the concrete insert 7 hereinafter described. The distance between the upper edges of these members is such as just to admit the insertion of a T-head bolt as shownin Fig. 2. The aperature 2 is preferably circular in section but may be of any other convenient shape desired.

In Figs. l and 2 the bolt and locking device are shown in the proper position for supporting structure 9 or the like. An insert 7 of well known design is embedded in a concrete ceiling, wall or ioor 8 so that the shoulders l5 of its slot are iiush with the ceiling, wall or floor sur-face. The locking device shown in Fig. 3 is then slipped over a threaded T-head bolt so that the shank 3 projects through aperture 2. The locking device is loosely secured upon the bolt by means of nut 10., as shown in Fig. 4t. Bolt head 6 is then inserted lengthwise into the slot of insert 7 and given a quarter turn.

With the bolt in this position the locking device is slid along the shanlrvof the holt until the base 1 is flush with the under surtace of insertr' and projecting members 4 and 5 engagel with the sides of bolt head 6, as shown in Figs. 1 and 2. The whole is then securely fastened by means of nut 10 and the structure 9 to be supported is then secured to shank 3 in an obvious manner by means of Hanges 13 and 14 and nuts 11 and 12. y

lt. is clearly evident from an inspection of Figs. 1 and 2 that bolt head 6 cannot turn since it is gripped between projecting members a'- and 5 which themselves cannot move due tothe fact that they fit snugly into the slot as above mentioned.

lVhile this locking device has been disclosed in conjunction with a concret-e insert, it is obvious that it may be employed generally for locking bolt heads.

that is claimed is:

1. The combination with an insert for concrete construction comprising a hollou7 body portion with internal. supporting tianges forming an elongated entrance slot therebetween of a T-headed bolt, the head of which when inserted through said slot and rotated is supported by said flanges, an apertured locking plate having projections integrally formed therewith for engaging theI head of said bolt and the faces of said slot, and means to clamp said bolt, plate and insert together, thereby preventing the rotation of said bolt.

2. The combination, with a supporting member having a slot therein, of a T-headed bolt, the head of which when inserted through said slot and rotated is not withdrawable therethrough, and an apertured locking plate having projections integrally formed therewith for engaging the head of said bolt and the faces of said slot for locking said bolt against rotation.

3. The combination with a supporting member having a slot therein, of a T-headed bolt, the head of which when inserted through said slot and rotated is not withdrawable therethrough, and an apertured locking plate having oppositely disposed projections of substantially the width of said slot, said plates when placed within its projections extending through said slot and with the outer edges of said projections embracing the side faces of the head of said bolt, locking itself and said bolt from turning.

4. The combination with an insert for concrete construction comprising a chambered body portion with internal supporting flanges forming an elongated entrance slot, an attaching member adapted for .insertion within said body portion at any point along Said slot, and a locking device assembled with said member for engagement with the faces of said slot and with said attaching member to retain said member within said body portion.

In witness whereof, I hereunto subscribe my name this 30th day of November A. D.,

HEBER E. MARTIN G. 

